14-11-14, 11:28 AM
Low volts so soon after riding definitely points to a charging issue and if the alarm and instruments are drawing 1.5mA that only means about 1AH of drain per month.
There's no commutator/brushes to worry about, it's an AC magneto.
Check the three white leads from the generator all measure about 0.3Ω to each other (remember to subtract the multimeter's lead resistance) and check there's no continuity to ground.
If the wiring and connectors are all in a good, secure condition (check the negative connection to the chassis too) then it does point to the reg/rect as the cause of the problem. Prolonged under-charging may have weakened the battery too.
There's no commutator/brushes to worry about, it's an AC magneto.
Check the three white leads from the generator all measure about 0.3Ω to each other (remember to subtract the multimeter's lead resistance) and check there's no continuity to ground.
If the wiring and connectors are all in a good, secure condition (check the negative connection to the chassis too) then it does point to the reg/rect as the cause of the problem. Prolonged under-charging may have weakened the battery too.